2013
DOI: 10.7824/rbh.v12i3.204
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Seletividade de herbicidas aplicados com óleo mineral na cultura da mandioca ‘Cascuda’

Abstract: Resumo -O uso de adjuvante pode influenciar na seletividade dos herbicidas as culturas agrícolas. Objetivou-se avaliar a seletividade de herbicidas aplicados com diferentes concentrações de adjuvante óleo mineral na cultura da mandioca 'Cascuda'. O delineamento experimental utilizado foi o de blocos ao acaso, com quatro repetições. Foi utilizado o esquema fatorial 3x3+1 que consistiu de três herbicidas clethodim (120 g ha -1 ); fluazifop-p-butyl (250 g ha -1 ) e mesotrione (240 g ha -1 ), três concentrações de… Show more

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Cited by 5 publications
(9 citation statements)
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“…Other herbicides did not cause significant effects for these variables. Costa et al (2013) noted that mesotrione also did not reduce the height of cassava plants. Carfentrazone-ethyl showed higher leaf number than control treatment, however did not differ significantly (Figure 1), indicating, even any damage occurred immediately after application, there was no interference in the development of the plant shoot.…”
Section: Resultsmentioning
confidence: 98%
“…Other herbicides did not cause significant effects for these variables. Costa et al (2013) noted that mesotrione also did not reduce the height of cassava plants. Carfentrazone-ethyl showed higher leaf number than control treatment, however did not differ significantly (Figure 1), indicating, even any damage occurred immediately after application, there was no interference in the development of the plant shoot.…”
Section: Resultsmentioning
confidence: 98%
“…O clethodim é um herbicida que inibe a atividade da enzima acetilcoenzima A carboxilase (ACCase) e a síntese de lipídeos nas plantas da família Poaceae (Délye et al, 2005), sendo muito seletivo para culturas eudicotiledôneas. Costa et al (2013b) relataram que a pulverização de clethodim (120g i.a ha -1 ) em POS sobre plantas da cultivar 'Cascuda' não provocou nenhum sintoma de intoxicação. Por sua vez, a pulverização do glifosato resultou em níveis de fitotoxicidade nas plantas da cultura significativamente superiores aos do clethodim e da testemunha capinada (Tabela 6).…”
Section: Resultsunclassified
“…The observed symptoms were caused by the inhibitors of the carotenoids synthesis (clomazone and mesotrione), once the caused injuries are characteristics of this mechanism of action, because yellowing o whitening of all foliar limbo mostly in the young leaves from the plants apex, or in leaves from the medium third with yellowing of the edges followed by necrosis and crooked areas. However, cassava is tolerant to herbicides from the group of pigment synthesis inhibitors such as clomazone and mesotrione, because they do not affect productivity (Silveira et al, 2012;Costa et al, 2013a).…”
Section: Resultsmentioning
confidence: 99%